Yes. In fact, it is often the default shell.
bash (Bourne Again Shell) is the default shell in most Linux distributions. It was created as part of the GNU project.
No. Bash runs entirely in userspace; it is not part of the Linux kernel. Although ti is extremely common, it is quite possible to have a working Linux distribution without it.
C, C++ and scripts in Bash, Perl and Python
Most systems will come with BASH installed.
The courses available for Linux include Linux server, Linux desktop, bash shell, and many others.
/etc/profile# /etc/profile: system-wide .profile file for the Bourne shell and Bourne compatible shells (bash(1), ksh(1), ash(1), ...)
"powershell" on windows and "bash" on linux. I'm pretty sure mac uses bash too
The PATH variable.
Strictly speaking, a "shell" is simply the interface between the user and the rest of the operating system. In that definition not all shells on Linux are command lines. However, most day-to-day usage of the term "shell" does refer to command line user interfaces. Finally, "Linux shell" is not a thing. Linux is an operating system, specifically a kernel, not a shell. Most Linux distributions use BASH, but I personally prefer ZSH.
There are many user interfaces for both unix and Linux and most can be used on both. For example kde,gnome,bash shell, ect.
Depends on the distro, but most use wither bash or sh.
BASH, SH, ZSH, iPython, FISH, CSH, X, etc.